Noun
voluntary muscle (plural voluntary muscles)
(anatomy) Muscle that is normally controlled by individual volition; skeletal muscle.
voluntary-muscle
Motor speech disorders group of disorders caused by the inability to accurately produce speech sounds (phonemes) because of muscle weakness or incoordination or difficulty performing voluntary muscle movements. Source: Internet
Resulting sensory loss may be seen as a tremor or ataxia (inability to coordinate voluntary muscle movement) of the affected limbs and problems with gait and balance. Source: Internet